Gadget Round-Up: pet trackers, action cams, and a glow in the dark bike

VIVITAR DVR787HD Action Camcorder £99.99 Currys.
Vivitar Cameras, a leading camera manufacturer for over 75 years, has
recently introduced the affordable, DVR 787 HD - a 1080p, High Definition,
remote control video camera that captures video at 60 fps. The Vivitar DVR
787 comes with a waterproof case, extending its use to water sports such as
surfing and snorkelling, with a maximum submersion of 30 feet. You can also
mount the action camcorder on tricky surfaces using the included bicycle or
helmet mount.